  export function clickEffect() {
  let balls = [];
  let longPressed = false;
  let longPress;
  let multiplier = 0;
  let width, height;
  let origin;
  let normal;
  let ctx;
  const colours = ["#F73859", "#14FFEC", "#00E0FF", "#FF99FE", "#FAF15D"];
  const canvas = document.createElement("canvas");
  document.body.appendChild(canvas);
  canvas.setAttribute("style", "width: 100%; height: 100%; top: 0; left: 0; z-index: 99999; position: fixed; pointer-events: none;");
  const pointer = document.createElement("span");
  pointer.classList.add("pointer");
  document.body.appendChild(pointer);

  if (canvas.getContext && window.addEventListener) {
  ctx = canvas.getContext("2d");
  updateSize();
  window.addEventListener('resize', updateSize, false);
  loop();
  window.addEventListener("mousedown", function(e) {
  pushBalls(randBetween(10, 20), e.clientX, e.clientY);
  document.body.classList.add("is-pressed");
  longPress = setTimeout(function(){
  document.body.classList.add("is-longpress");
  longPressed = true;
}, 500);
}, false);
  window.addEventListener("mouseup", function(e) {
  clearInterval(longPress);
  if (longPressed == true) {
  document.body.classList.remove("is-longpress");
  pushBalls(randBetween(50 + Math.ceil(multiplier), 100 + Math.ceil(multiplier)), e.clientX, e.clientY);
  longPressed = false;
}
  document.body.classList.remove("is-pressed");
}, false);
  window.addEventListener("mousemove", function(e) {
  let x = e.clientX;
  let y = e.clientY;
  pointer.style.top = y + "px";
  pointer.style.left = x + "px";
}, false);
} else {
  console.log("canvas or addEventListener is unsupported!");
}


  function updateSize() {
  canvas.width = window.innerWidth * 2;
  canvas.height = window.innerHeight * 2;
  canvas.style.width = window.innerWidth + 'px';
  canvas.style.height = window.innerHeight + 'px';
  ctx.scale(2, 2);
  width = (canvas.width = window.innerWidth);
  height = (canvas.height = window.innerHeight);
  origin = {
  x: width / 2,
  y: height / 2
};
  normal = {
  x: width / 2,
  y: height / 2
};
}
  class Ball {
  constructor(x = origin.x, y = origin.y) {
  this.x = x;
  this.y = y;
  this.angle = Math.PI * 2 * Math.random();
  if (longPressed == true) {
  this.multiplier = randBetween(14 + multiplier, 15 + multiplier);
} else {
  this.multiplier = randBetween(6, 12);
}
  this.vx = (this.multiplier + Math.random() * 0.5) * Math.cos(this.angle);
  this.vy = (this.multiplier + Math.random() * 0.5) * Math.sin(this.angle);
  this.r = randBetween(8, 12) + 3 * Math.random();
  this.color = colours[Math.floor(Math.random() * colours.length)];
}
  update() {
  this.x += this.vx - normal.x;
  this.y += this.vy - normal.y;
  normal.x = -2 / window.innerWidth * Math.sin(this.angle);
  normal.y = -2 / window.innerHeight * Math.cos(this.angle);
  this.r -= 0.3;
  this.vx *= 0.9;
  this.vy *= 0.9;
}
}

  function pushBalls(count = 1, x = origin.x, y = origin.y) {
  for (let i = 0; i < count; i++) {
  balls.push(new Ball(x, y));
}
}

  function randBetween(min, max) {
  return Math.floor(Math.random() * max) + min;
}

  function loop() {
  ctx.fillStyle = "rgba(255, 255, 255, 0)";
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  for (let i = 0; i < balls.length; i++) {
  let b = balls[i];
  if (b.r < 0) continue;
  ctx.fillStyle = b.color;
  ctx.beginPath();
  ctx.arc(b.x, b.y, b.r, 0, Math.PI * 2, false);
  ctx.fill();
  b.update();
}
  if (longPressed == true) {
  multiplier += 0.2;
} else if (!longPressed && multiplier >= 0) {
  multiplier -= 0.4;
}
  removeBall();
  requestAnimationFrame(loop);
}

  function removeBall() {
  for (let i = 0; i < balls.length; i++) {
  let b = balls[i];
  if (b.x + b.r < 0 || b.x - b.r > width || b.y + b.r < 0 || b.y - b.r > height || b.r < 0) {
  balls.splice(i, 1);
}
}
}
}
